Canada appears poised to rack up a climate-change win, says a recent government report submitted to the United Nations.

The federal report filed last month says Canada is on track to meet one of its crucial climate-change commitments—generating at least 90 per cent of non-industrial electricity from emissions-free sources by 2030.

EDMONTON—Allowing Ottawa's carbon tax law to stand would give the federal government a tool it could use to repeatedly chip away at provincial powers, lawyers for the Alberta government argued yesterday.

“If you uphold this legislation, you're opening the door to exactly that type of thing,” Peter Gall told a panel of five Alberta Court of Appeal judges.

When drivers tried to travel the Mackenzie Valley winter road in the Northwest Territories last March, it was an unpassable highway of muck well before its usual closure date. Four communities were left without vehicle access.